All of these reported cases occurred in people who had direct or indirect contact with swine prior to their illness, the release stated.

According to the release, the 10 cases in Ohio were associated with attendance at a fair where reportedly ill swine were present, while the H3N2v case reported by Indiana also occurred in a person who attended a fair where swine were present.

The CDC has stated that it is possible that acquisition of the M gene from the 2009 H1N1 virus may allow H3N2v viruses to be more transmissible from pigs to people and from person to person, the release noted.

The CDC advises the public to take recommended precautions — particularly frequent hand washing — when interacting with pigs or their environments, the release added.